Fire-alarm.



Patented July l5 I902.

C. R. HARRIS.

Fl R E A L A R M.

(Application filed May 3, 1899. Renewed Nov. 25, 1901.

(No Model.)

IN VEN TOR Alluring which will be extremely simple in construc- UNrrisn Starts Parent OFFICE.

CHARLES R. HARRIS, OF WYlLLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO THE HARRIS SAFETY OOMPANY, OF NEW YORK, N. Y.

FIRE-ALARM.

QPECIFICATION forming part Of Letters Patent NO. 704,681, dated July 1 5, 1902.

Application filed May 3, 1899. Renewed November 25, 1901. Serial No. 83,619. (No model.)

To aZZ whom it may concern.-

Be it known that 1, CHARLES R. HARRIS, of Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvementsin Fire-Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in fire-alarms, the object of the invention being to provide a fire-alarm which will automatid ally give warning in case of fire in any of the various parts of a building.

A further object is to provide a fire-alarm tion, cheap to manufacture, neat and attractive in appearance, and most effectual in giving warning in case of a fire.

WVith these objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter described, and pointed out in the claim.

In the accompanyingdrawings, Figure 1 is a View illustrating my improvements, and Figs. 2, 3, and 1 are detail views of same.

A represents a circular base-plate or sup port provided on its rear face with an eye or loop 1 for securing the alarm to the wall.. I would have it understood that I may provide two or more of these eyes or loops 1 and se cure the device to the ceiling, or the device may be supported by chains (not shown) suspended from the ceiling. In fact, I do not wish to limit myself to any particular means for supporting the device, but consider myself at liberty to employ any means which may be best fitted or adapted to the building in which the alarm is placed.

The plate A has secured on its outer face a metal disk 2 of the same diameter as the plate, and another circular disk 3 of smaller diameter than the disk 2 is secured centrally on the disk 2 by means of screws A passing through holes in said disk, and the disk 3 may be provided with a central opening for the purpose lightening and cheapening it, if desired. The disk 3 is provided with a peripheral flange 5, and a suitable clock mechanism 6 is secured on said disk 3. The spring-shaft 7 of the clock mechanism projects upward a suitable distance and is provided on its upper end with screw-threads 8, adapted to mesh with screw-threads in the central portion of a gong 9, and it will be seen that when the gong is screwed home on the shaft 7 a further turning of the gong will wind up the spring 10 on the shaft 7. The edge of the gong 9 is disposed in alinement with and spaced a short distance from the flange 5, hence leaving a small space between'the gong and flange to permit of a clear sounding of the gong. A vertical arbor 11 is mounted in the clock mechanism and is provided near its lower end with an escapement-pallet 12, adapted to engage an escapement-wheel13 of j the clock mechanism, and a suitable clapper 14 is also secured to said arbor ll and is adapted to be vibrated by the escapement-wheel 13 and pallet 12 to sound the gong. Another arbor 15 is mounted in the clock mechanism parallel with and in proximity to the arbor 11, and the said arbor 15 is provided with a pin or lug 16, adapted to bear against the pallet andnormally-prevent ringing of the gong. A horizontal lover or arm 17 is also secured to the lower portion of the arbor 15 and projects outward between the gong and flange 5 and is provided in its outer end with a hole or opening 18, in which a suitable cord or chain 19 is' secured. The cord 19 is drawn taut to hold the arm or lever 17 in position to force the lug 16 in engagement with the pallet 12 and prevent ringing of the gong. The cord 19 is carried through different parts of a building and is provided at intermediate points With fusible-wire sections20, as shown, so that when a fire occurs in the building the heat therefrom will destroy a section of fusible wire and cause the release of the lever or arm 17 and the pin or lug 16 from the pallet 12, and hence permit the sounding of the alarm. Any suitable pin or projection 21 may-be provided on the flange 5 to limit the movement of the lever or arm 17.

A casing or covering 22 of open-work and of any desired design incloses the gong and clock mechanism and is provided around the periphery of its base portion with a series of L-shaped recesses 23, adapted to receive headed projections 24 on the periphery of the plate A to lock the casing in position. Any suitable thermometer, barometer, or clock 25 is mounted in the outer end of the casing for purposes of ornamention and utility. It will be seen that as I construct my improved casing 22 {of open-work it will serve as a protector to the gong and clock mechanism and will at the same time permit the free escape of the sound-vibrations of the gong.

Various slight changes might be resorted to in the general form and arrangement of the several parts described without departing from the spirit and scope of my invention, and hence I would have it understood that I do not wish to limit myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly-fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, an alarm device comprising a base, a striking mechanism secured thereto, a gong secured to the spring-shaft of said mechanism, a casing removably secured to the base and inclosing the striking mechanism and gong, a pivoted lever, an arm projecting from said lever and a cord or wire having a fusible section secured at one end to said lever and adapted to be secured to a fixed object at its other end to hold said arm of the lever against the escapement-verge with sufficient pressure to retain the striking mechanism normally at rest, said lever and its arm being so constructed and arranged that the verge will throw the latter out of its path of movement when the tension of the cord or wire is removed by the severance of the fusible section thereof.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHAS. R. HARRIS.

Witnesses:

E. G. WILHELM, L. B. HARTMAN. 

